remus



(No Model.) 3 Sheets-Sheet 1.

G. T. REMUS. MAOHINE FOR MAKING METAL JOINT FASTENINGS FOR BOXES. NO. 431,995.

Patented July 8, 1890.

Inventor CARL T500015? REM u; li e/ his uimrne y (No Model.) 3 Sheets-Sheet 2.

G. T. RE'MUS.

MACHINE FOR MAKING METAL JOINT FASTENINGS FOR BOXES. No. 431,995. Patented July 8, 1890.

Inventor (No Model.) 3 Sheets-Sheet 3. C. T. REMUS. MACHINE FOR MAKING METAL JOINT FASTENINGS FOR BOXES. NO. 431,995.

Patented J111y'8, 1890.

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UNITED STATES PATENT OFFICE.

CARL TEODOR REMUS, OF DRESDEN, GERMANY, ASSIGNOR TO JEAN SCHER- BEL, OF SAME PLACE.

MACHINE FOR MAKING METAL JOINT-FASTENINGS FOR BOXES.

SPECIFICATION forming part of Letters Patent No. 431,995, dated July 8, 1890.

Original application filed September 20, 1887, Serial No. 250,229 3 divided and this application filed November 29,1889. Serial No. 331,994. (N0 model.) Patented in England May 28, 1887, No. 7,807; in Belgium July 14,1887, No- 78,203 in France July 15, 1887, No. 184,818, and in Austria-Hungary December 7, 1887,110. 22,307 and No. 58,233.

To all whom it may concern.-

Be it known that I, CARL TEODOR REMUS, a subject of the Emperor of Russia, and a resident of Dresden, in the Kingdom of Saxony and Empire of Germany, have invented an Improved Machine for Making Metal Joint- Fastenings for Boxes, (patented to me in Belgium, No. 78,203, dated July 14, 1887; in France, No. 184,818, dated July 15, 1887; in England, No. 7,807, dated May 28, 1887, and in Austria-Hungary, No. 22,307 and No. 58,233, dated December 7, 1887,) of which the following is a specification.

This invention is a division of certain improvements in machines for making metal corner-fastenings for boxes of paper, pasteboard, wood, or similar material set forth by me in a previous specification which formed part of an application (Serial No. 250,229) filed in the United States Patent Office on the 20th day of September, 1887. (Patent No. 417,337, dated December 17, 1889.) In both forms of the machine to which the description in said previous specification is now confined the sheet-metal strip from which the cramps are made must have serrated edges, while in the modified machine hereinafter described the strip has plain edges, the necessary serrations being produced in the machine.

The modified machine is especially advantageous when the cramps to be produced and fixed in place are short and have only asmall number of serrations or teeth.

In order that the modified machine may be the better understood the accompanying three sheets of drawings show also the machine described in the before mentioned previous specification, as represented on Sheet II of its accompanying drawings. (See Patent No. 417,337.) The sameis hereinafter referred to as the original machine.

In the accompanying drawings, Figures 1, 2, and 3 are three Views of the said original machine, showing three consecutive positions during its operation. Figs. 4, 5, and 6 are vertical longitudinal sections of the hammer end of the same corresponding, respectively, with Figs. 1, 2, and Fig. 7 is a partial front view of the same, as seen in Figs. 3 and 6. Figs. 8 and 9 showalongitudinalsection and plan, respectively, of its die-plates which shape the sheet-metal strips into cramps. Figs. 10, 11, and 12 are three sectional views of the said die-plates; 10 near the endat which the strip enters, 11 through the middle, and 12 near the exit end. Figs. 13, 13, 14:, 14, 15 and 15 are sections and elevations ofthe sheet-metal strip at consecutive periods of the manufacture of the cramps by said original machine. Fig. 16, Sheet II, is a sectional view similar to Fig. 6, but on a larger scale, showing a first form of the modified machine. Fig. 17 represents ahorizontal section at I I, Fig. 16. Fig. 18 represents a crosssection at 11 II, Fig. 16, and-Figs. 19 and 20 show cramp-pieces such as are produced in this form of the modified machine. Fig. 21, Sheet III, is a sectional view similar to Fig. 16,showing another form of the modified n1achine. Fig. 2 represents a horizontal section at I I, Fig. 21. Fig. 23 represents a cross-section at II II, Fig. 21. Figs. 24:, 25, and 26 show details of its cramp-piece feed, and Fig. 22 shows plan and edge views of a cramp as produced by such second form of the modified machine. Fig. 27, Sheet III, is a sectional view similar to Fig. 22 above, representing a third form of the modified machine, as hereinafter described.

Like letters of reference indicate corresponding parts in all the figures.

The reference-letters in the present specification referring to said Figs. 1 to 15 inclusive, and to those parts of the original machine that are used in the modified machine also indicate the same parts as in the said previous specification, (Patent No. 117,337,) so as to facilitate comparison.-

In the original and modified machines in common, a horizontal pin A, Sheet I, pivots a two-armed lever B 13', whose main arm B is located above an anvil O and carries at its extremity a hammer-head D. A verticallymovable slide E works between guides formed on the hammer-head and carries a pair of feeding-rollers s t and a pair of shaping-dies f g. Thelatter are operated by impact with the anvil O, which is supported beneath them between cheeks F, so that it may at will be projected to support the work beneath the lower end of the hammer-head. Normally the hammer-head is elevated, as in Fig. 1, being held in this position by a spring or weight through a rod a, the arm B resting upon a bolster Z). A rod 0 connects the leverarm B with a treadle or crank for the effective movements of the lever, and motion is transmitted from the lever-arm B to the feeding-rollers s t as follows: A stud-pin 0, carried by said lever-arm B, works in an inclined slot in a lever 19, which is pivoted to the base of the machine and is connected at its upper end by a rod q to a lever 'm, which carries a pawl 91-, and is pivoted on a horizontal shaft 76, that turns in bearings in said slide E. A ratchet-wheel Z, fast on said shaft in, is thus turned so as to intermittingly rotate the shaft, and mot-ion is transmitted from the latter to the feeding-rollers, as by gearing 2' h in the original machine. The lower end of the hammer is V-shaped, with a small recess at its angle, as seen in Fig. 7; and in order that the cramps shall be retained on the recessed face of the hammer when they are fed beneath it the oblique surfaces of the hammcr-head are provided with small plates X,

pressed downward by a spring or springs y. A single arched spring extending through the hammer-head and pressing on both plates is represented in Fig. 7 and the succeeding figures. The shaping-dies of said original machine are shown in detail by Figs. 8 to 15, inclusive, and those of the modified machine are or may be identical therewith as regards their adaptation to gradually bend the sheet metal into shape as it progresses between them. The serrated sheet-metal strip in the said original machine is fed longitudinally by the feeding-rollers s 25 into or between the die-plates f g, which by degrees form the strip into cramps by the lower plate being repeatedly pressed against the upper plate during repeated descents of the hammer B D. At every descent of the hammer a finished cramp is fed under the face of the hammerhead D and cut off from the strip by the shearing action of the back edge of the hammer-face and the front edge of the lower dieplate, the hammer fixing it then on the box parts 'placed on the anvil.

The present modifications in the machine consist, first, in the direction of feed of the sheet-metal strip, which, instead of being in a longitudinal direction, is now at a rightor obtuse angle to the longitudinal axis of the machine.

In the accompanying drawings, Figs. 16 to 20, Sheet II, relate to the first case of perpendicular feed, and Figs. 21 to 27, Sheet III, relate to the second case of obtuse angular feed. In both cases the die-plates are formed with shearing-edges 2 at or near their rear ends at those places where the sheet-metal strip enters between them. The edges .2 cut a small piece from the strip when the lower die-plate reaches the anvil O and is pressed against the upper die-plate. If the sheetmetal strip is fed ata right angle to the working axis of the machine, Fig. 17, the edges 2 are serrated according to the shape andnumber of teeth required on the cramps; but they are straight if the feed is effected at an obtuse angle to the working axis of the die plates, Figs. 22 and 27. When the shearingedges are serrated, the cut-off cramp-pieces are formed with teeth corresponding to the shape of the serrations and situated alternately to one another on the opposite sides of the cramp-piece. The latter may have two teeth 011 either side, Fig. 19, or three on one side and two on the other, Fig. 20, or four 011 one side and three on the other, and so on.

The length of the cramp-pieces is regulated by the distance between the shearing-edge and a butting-face .2 on the lower die-plate g. The feed of the strip is adjusted so that as soon as it is finished the serrated front end of the strip butts against the said buttingface .2 The cut-off cramp -pieces are fed between the working-faces of die-plates during the ascent of the hammer B, the feed being effected by the feeding mechanism. (Shown in Figs. 16, 17, and 18, Sheet II, and Figs. 21 to 26, Sheet III. The former figures refer to the feed at a right angle, the latter to the feed at an obtuse angle.) The main part of the feeding mechanism is this feeder a, which is arranged in a recess of the slide E, and has a slot into which gears the downward arm of a bell-crank lever o o. In the recess of the slide works also the downward arm of a bracket 10, which is bulged at w and attached to the hammer-shaft B. \Vhen the feeder a is at rest, it is sufficiently distant from the working-face of the die-plate to avoid interfering with the entrance of the sheet-metal strip. It operates against the reaction of a spiral spring a suitably applied to it. iVhen the hammer is at its highest point of travel, Fig. 1, the bulged end 10 is above the sideward arm '11 of the bell-crank lever o. WVhen at the descent of the hammer, the slide E touches the anvil and commences to slide along the back of the hammer-head, Fig. 2, the bulged end w passes the arm oand compels the bell-crank lever to turn to the left, the lever-arm o moving in the slot of the feeder 20 without affecting the latter. WVhen, then, the hammer commences to ascend, the bulged end w strikes the arm '0 in the opposite direction, as before, while the slide E returns into its former position on the 11ammer -head. The bellcrank lever 11 1: now turns to the right and its arm 0) moves the feeder to forward, and thus pushes the cramppiece in front of it between the working-faces of the die-plates f g. lVhen the slide E has finished its return motion, the bulged end w of the bracket 20 is again above the lever-arm o and the feeder a has been pulled back into its former position by the spiral spring at,

which had been put in tension by the forward motion. The cramp piece last introduced feeds forward the cramp-pieces before it, and the several cramppieces are successively formed into cramps in their advance by degrees through the dies. The finished cramps arrive singly in the recess of the hammer D and are hammered by the latter on the edges, &c.,to be connected.

If the sheet-metal strip is fed at an obtuse angle to the longitudinal axis of the machine and the shearing-line is arranged, as in Fig.

2, so that the pieces cut olf from the sheetmetal strip are either of rhombic or rhomboidal shape, the further action of the dies produces cramps with one tooth on each side. (See Fig. 2 In this case the feeder is of modified form, illustrated by a longitudinal section, Fig. 24;, a transverse section, Fig. 25, and a plan, Fig. 26, and consists of a plate, of which the side toward the die-plates has are cess n whose shape corresponds to the angle of the on t-off sheet-metal rhonibi or rhomboids. It is advisable to form the lower shearing-edge by the side of the recess a over which the introduced sheetmetal strip is placed, and which, coacting with the shearingedge above it of the upper die-plate, cuts by the movement of the lower die-plate a piece off the sheet-metal strip of rhombic or rhomboidal shape. This (ramp-piece remains on the lower die-plate, and is therefore fed between the working-faces of the die-plates by the next forward movement of the feeder it. To prevent any failure of the operation, the feeder must take part in the slight upward movement of the die-plate effected in consequence of the latter striking on the anvil. For this purpose the feeder rests on an anglepiece y, attached -to the lower die-plate, and it is guided by a pin 00, screwed into the angle-piece y and projecting into a slot in the feeder.

If the angle at which the sheet-metal strip is fed is very obtuse and the shearing-edge of the die-plate is at a right angle to the longitudinal axis of the latter, as shown in Fig. 27, the before-described cramp-piece-feeding mechanism may be dispensed with, as the advancing sheet-metal strip pushes the cut-oit' cramp-piece between the die-plates without any other aid.

The sheet-metal strip is fed to the shearing edges 2' by a feeding mechanism, Figs. 16, 17, and 18, Sheet II, and Figs. 21, 22, 23, and 27, Sheet III, which comprises the stud-pin 0, slot-- ted lever p, connecting-rod q, pawl-carrying lever on, pawl 92, ratchet-wheel Z, and shaft 10 of the feedin mechanism of said original machine, Sheet I.

The function of the ratchet-wheel is modified in the arrangementrepresented by Figs. 16 to 18, Sheet II, the intermittent rotation of the wheel being transmitted only to the lower feeding-roller t, the upper feeding-rollers being rotated by friction. In the other modified arrangements, Sheet III, the'roller-shafts are connected by spur-gears h, as before. The gearing which transmits motion from said shaft to the roller-shafts consists, in the present case, of bevel-wheels 7L h, which are of a right angle or miter wheels when the strip is fed at a right angle, and of an oblique angle or beveled wheels when the strip is fed at an obtuse angle, as will be understood without further description.

Having now described this invention, what I claim is 1. The combination, with the hammer 113 D and the anvil C, of die-plates f g, having shearing-edges z where the metal strip enters between them, strip-feeding rollers s t at an angle to thelongitudinal line of the die-plates, and suitable actuating devices, substantially as hereinbefore specified.

2. The combination, with the hammer B D, slide E, and anvil O, of die-plates f g, having shearing-edges 2' where the metal strip enters between them, strip-feeding rollers s 25 at an angle to the longitudinal line of the die-plates, cramp-piece-feeding mechanism, consisting of a reciprocating feeder 'u, and a bell-crank lever 11 '0, carried by said slide, a bracket w w, carried by the hammer-shaft, and a retracting-spring u, and suitable actuating devices, substantially as hereinbefore specified.

3. The die-plates f g, having tootlrforming shearing-edges z and a butting-face 2 where the metal strips enter between them and opposing faces between which the cut-off cramp-pieces are shaped into cramps as they are fed forward, in combination with the 11ammer B D, anvil C, strip-feeding mechanism, cramp-piece-feedin g mechanism, and suitable actuating devices, substantially as hereinbefore specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CARL TEODOR REMUS.

Witnesses:

PAUL DnUcKMiiLLnR, G. BARTHoLAMAUs. 

